[완료]소켓 프로그래밍 중 명령어와 인자를 인식하는 부분이 잘 안되요ㅠ

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
 
#define COMMAND_BUFSIZE 30
#define MESSAGE_BUFSIZE 500
 
int my_strcmp(const char *string1, const char *string2);
void error_handling(char *command);
 
int main(int argc, char **argv){
	int serv_sock;
	int clnt_sock;
 
	char rv_message[30];
 
	char command[COMMAND_BUFSIZE];
	char message[MESSAGE_BUFSIZE]="Hello World";
	int str_len;
	int clnt_addr_size;
 
	struct sockaddr_in serv_addr;
	struct sockaddr_in clnt_addr;
 
	struct hostent* hostp;
 
 
 
 
	clnt_addr_size=sizeof(clnt_addr);
 
	if(argc!=2){
		printf("Usage : %s <port>\n", argv[0]);
		exit(1);
	}
 
	if((serv_sock=socket(PF_INET, SOCK_STREAM, 0))<0)
		error_handling("serv socket() error");
 
 
 
	memset(&serv_addr, 0, sizeof(serv_addr));
	serv_addr.sin_family=AF_INET;
	serv_addr.sin_addr.s_addr=htonl(INADDR_ANY);
	serv_addr.sin_port=htons(atoi(argv[1]));
 
 
	if(bind(serv_sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr))<0)
		error_handling("bind() error");
 
 
	if((listen(serv_sock, 5))<0)
		error_handling("listen() error");
 
 
	printf("Student ID : 20031943\n");
	printf("Name : Sungjin Park\n");
 
 
	for(;;){
		printf("WBS>");
		fgets(command, COMMAND_BUFSIZE, stdin);
 
		if(strcmp(command, "quit\n")==0 || strcmp(command, "QUIT\n")==0) 
			break;
 
		if(my_strcmp(command, "get")==0 || my_strcmp(command, "GET")==0){      ///이부분으로 안넘어가집니다.ㅠ
			if(argc!=3){
				printf("Usage : %s <IP> <port>\n", argv[0]);
				exit(1);
			}
			else
				exit(1);
 
 
			memset(&serv_addr, 0, sizeof(serv_addr));
			serv_addr.sin_addr.s_addr=inet_addr(argv[1]);
 
			if ((hostp = gethostbyaddr((char*)&serv_addr.sin_addr, 4, AF_INET))== 0) {
			fprintf(stderr,"%s: unknown host\n",argv[2]);
			exit(1);
			}
 
			serv_addr.sin_family=AF_INET;
			serv_addr.sin_port=htons(atoi(argv[2]));
 
			if((connect(serv_sock, (struct sockaddr*)&serv_addr, sizeof(serv_addr)))<0)
				error_handling("connect() error");
 
			if((str_len=read(serv_sock, rv_message, sizeof(rv_message)-1))<0)
				error_handling("read() error");
 
			rv_message[str_len]=0;
			printf("Message from server : %s \n", rv_message);
			close(serv_sock);
 
		}
		else{
			printf("Invalid command\n");
			continue;
		}
 
		if((clnt_sock=accept(serv_sock, (struct sockaddr*)&clnt_addr, &clnt_addr_size))<0)
		error_handling("accept() error");
 
		write(clnt_sock, message, clnt_addr_size);
 
		close(clnt_sock);
	}
 
	return 0;
}
 
void error_handling(char *command){
	fputs(command, stderr);
	fputc('\n', stderr);
	exit(1);
}
 
int my_strcmp(const char *string1, const char *string2){
 
	while(*string1==*string2 && !isspace(*string2)) {
			string1++;
			string2++;
	}
		if(*string1<*string2)
			return (-1);
		else if(*string1>*string2)
			return (1);
		else
			return (0);
	return 0;
}